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application/pdfIEEEIEEE Systems Journal; ;PP;99;10.1109/JSYST.2019.2920658Base stationsmobile communicationnetwork topologywireless communicationStudy on Base Station Topology in National Cellular Networks: Take Advantage of Alpha Shapes, Betti Numbers, and Euler CharacteristicsYing ChenRongpeng LiZhifeng ZhaoHonggang Zhang
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